2165126339 has 2 divisors, whose sum is σ = 2165126340. Its totient is φ = 2165126338.

The previous prime is 2165126317. The next prime is 2165126347. The reversal of 2165126339 is 9336215612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2165126339 - 2²⁰ = 2164077763 is a prime.

It is not a weakly prime, because it can be changed into another prime (2165126539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082563169 + 1082563170.

It is an arithmetic number, because the mean of its divisors is an integer number (1082563170).

Almost surely, 2^2165126339 is an apocalyptic number.

2165126339 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165126339 is an equidigital number, since it uses as much as digits as its factorization.

2165126339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 2165126339 is about 46530.9180975403. The cubic root of 2165126339 is about 1293.6826322471.

The spelling of 2165126339 in words is "two billion, one hundred sixty-five million, one hundred twenty-six thousand, three hundred thirty-nine".